Pneumatic tire



H. RYDER.

PNEUMATIC TIRE. APPLICATION FILED NOV. 12. I920.

Patented Oct. 4, 1921.

states HENRY aroma, or new roan, it. v;

rarenr orator;

PNEUMATIC TIRE.

Specification of Letters Patent. M

'Patented (let. 4, 119210 Application filed November 12, 1920. Serial No. 423,519.

To all whom it may concern? Be it known that I, HENRY RYDER, a citizen of the United States, residing at New York, in the county of New York, State of New York, have invented certain new and useful Improvements in Pneumatic Tires; and I do hereby declare the following to be a full, clear, invention, such as will enableothers skilled in the art to which it appertains to make and use the same. I

This invention relates 'to a pneumatic tirellor a tube for a pneumatic tire provided wit under certain conditions are closed to the passage of air from one tothe other and e on the inside of the tire which under other conditions will allow air to pass from one to the other.

An important object of the invention is to provide a pneumatic tire or tube for a pneumatic tire which is provided with a number of separate air chambers so qde-' signed that all the chambers may be inflated from one point, and yet one in which the escape of air in the event ot a puncture is localized to the particular chamber in which the puncture takes place.

Another object of the invention is to provide a chambered tire which maybe in flated from a single point, and yet so arranged that the air on the inside of the tire is prevented from circulating. around when the tire is in normal use. With the ordinary type of pneumatic tire or pneumatic tube the part in contact with the ground is more or less deformed, this deformation causing movement of the'air within the tire in a direction opposite to the direction of rotation. is movement of the air causes considerable friction between the air and the'inside 'of the tire and between the individual molecules of the air itself, both 'of which result in heating of the tire, a phenomenon which is well known and which is detrimem tal to the life of the tire and therefore to be avoided. The chambered tire built in accordance with my invention eliminates. this cause of heating and yet permits intition and and exact description of the .close. the aperture.

chambers or compartments which chambers. Each partition is provided with of valve flaps is associated with each aperture. valve flaps is hinged to the paris provided with a curved arm passing through the aperture. The other valve flap is carried on the other end of this arm so that either one flap or the other may,1 under certain conditions, operate toof the valve construction is that the arm connecting the valve flaps is arranged to keep the flaps at an angle of a little more than 90 with respect to each other.

Other objects and advantages of the invention will appear from the following description taken in connection with the accompanying drawings, in which Figure l. is a sectional view of an improved chambered tube, shown as traveling to the right; Fig- 2 is a sectional view on an enlarged scale showing the chambers and associated valves during inflation of the tire; Fig. 3 is a similar view showing the valves in normal position; Fig. at shows the positions assumed by the valves in case of a puncture of one chamber; and Fig. 5 shows one of the cup shaped units of which the tire is built. v

The pneumatic tire or pneumatic tube indicated at 5 is formed of a number of cup shaped units 6, each unit comprising the cylindrical wall? and the end wall 8. Each end wall is provided with an aperture 9.

A valve flap 12 is hinged on the left side of the partition 8 adjacent the aperture 9 so as tofopen and close the aperture. Flap 12 is provided with a rigid curved arm 13 extending to the right through the aperture; on the end of arm 13 and on the right side of the partition 8 is another .valve flap 11, preferably made smaller than number of units 6 by vulcanizing the open An important feature end of one unit to the closed end of the adj acent unit, thereby forming a number of air chambers could, of course, be formed in other ways, but Ihave found this method to be a chambers remainin at substantiall 45. 5S chamber 15 from the adjacent chambers it pushes the valve flaps that are in that champractical one for so doing. One of the chambers,,such as. 14, is provided with an inlet valve 17 of any well known type. The valve flaps 12, preferably made of some such flexible material as leather, rubber or canvas, are 50 mounted on the walls 8 so as to normally assume the positions shownin Fig. 3. 'Such valve flaps are possessed of a small amount of resiliency which tends to keep the valve flapsinthe'position shown in Fig. 3, which is the normal position. The resiliency of the flaps is suflicient to prevent the closing of the apertures9, which might result from the effect of gravity on the valve flaps when the valves are in the position shown at the right hand side of Fig. 1. When the tire is being inflated from the valve 17 the air passes from chamber to chamber successively to the left, as'shown in the drawings, all the way around the tire so that each chamber is brou ht to the full.

air pressure. During such i ation the'passage of air through the aperture 9 would press the valve flap 12 a short distance. to the left, but not enough to brin 1 the other flap near the closing position. A r the tire 1s inflated the valves will assume substan+ tially the osition shown in Fig. 3.

Fig. 4 s ows the position that would be assumed bythe valves in the event of a puncture of the chamber 15. The escape of the air through the puncture would immediately bring the pressure in that chamber to atmospheric, and there would be a tendency for. the air in the chambers 14 and 16 to rushinto the punctured chamber. Such a rush of air from th chambers 14 and'16 would promptly bring th valve flaps to the from the tire to t e chamber 15, the other their original pressure. the air rushes into the her inwardly of the chamber to thereby pull 'the'adjacent valve flaps into the path of on rushing air which catches them and'snaps them to theclosed position as shown in Fig.

4. The air pressure holds these valves closed and so further escape of air is prevented.

- some distance and would not be left practi cally helpless as would be the: case with an With only one chamber of the tire deflated the motorist :would still be able to travel absolutel flat tire. Y

The tu is mounted in its shoe so that the air in the tire, which as has been explained tends to move on the inside of the tire inadirection op osite to the direction of rotation of. the tire, tends-to shut the valve flaps 112. In Fig. 1 the tube or tire is shown as moving to the right and rotating to the sition shown in Flg. 4 to thereb localize't e escape'of air 0 right; the air in the tire tends to move a the left or counterclockwise. In Fig. 3 the air the heating of the tire due to the movement of airaround the inside of the tire with resulting friction of air a inst the inside wall of the tire and resulting friction between the individual particles of air. 1.

It should beunderstood that the essentia features of the invention may be carried out in other ways than in the specific embodiment here shown. 5 r

1' claim 1. A tube for a pneumatic tire, comprising a plurality. of a11- chambers se arated by transverse partitions each provi ed wlth an aperture and a pair of valve flaps connected for simultaneous movement associated with each partition. and aperture, whereby the tube may be inflated from one point and .whereby loss of air is localized to the cham* her in which a puncture takes lace.

2. A neumatic tire provide with a series .of chain ers separated from one another by partitions each of which is provided with a valve, each valve com rising two valve .flaps,

one otthe valve fla s eing hinged one of the partitions, an an arm connecting the two valve flaps for simultaneous movement.

' 3. A Pneumatic tire provided with a pluralty 0 air chambers, apertured partitions separating the chambers, a valve flap on each side of the partitions for closing the rture in thatpartition, and warm conecting the valve flaps to maintain an angle i substantially 90 between them.

4. A neumatic tire provided with a lurality 0 air chambers, apertured partitions separating the chambers, a valve flap oneach side of each partition for closing the aperture inthat partition, and an arm connect' of li ttlh over 90 between them.

-5. A tube for a pneumatic tire provided with a plurality of air chambers, apertured the valve flaps to maintain an angle iis artitions separating the chambers, a valve ap hinged to each partition adjacent the aperture inthat partition, an arm attached to said 'valve ha and extending through the aperture, an a; second valve flap attached to the end of. said arm for holding the two valve flaps at-an angle of a little over 90. with respect to'one another- 6. A chambered pneumatic tire or tube composed of a series of substantially cupshaped elements, each of which is provided with an aperture in the bottom thereof, "a

valve flap. on each side of "the bottom of each of said cup-shaped elements for closing the aperture therein, and means connecting respective pairs of valve flaps for simultaneous movement. 1

7 A chambered pneumatic tire or tube composed of a series ofcup-shaped elements,

' each provided with an aperture in the bot- Y tom thereof, a pair of valve flaps on opposite sides of the bottom of said elements ad- HENRY RYDER.

one of the flaps being ofsthe bottom, and an 10 

